#!/usr/bin/env ruby
require 'fileutils'

REPO = 'spec/support/gitlab-git-test.git'.freeze
PACK_DIR = REPO + '/objects/pack'
GIT = %W[git --git-dir=#{REPO}].freeze
BASE_PACK = 'pack-691247af2a6acb0b63b73ac0cb90540e93614043'.freeze

def main
  unpack
  # We want to store the refs in a packed-refs file because if we don't
  # they can get mangled by filesystems.
  abort unless system(*GIT, *%w[pack-refs --all])
  abort unless system(*GIT, 'fsck')
end

# We don't want contributors to commit new pack files because those
# create unnecessary churn.
def unpack
  pack_files = Dir[File.join(PACK_DIR, '*')].reject do |pack|
    pack.start_with?(File.join(PACK_DIR, BASE_PACK))
  end
  return if pack_files.empty?

  pack_files.each do |pack|
    unless pack.end_with?('.pack')
      FileUtils.rm(pack)
      next
    end

    File.open(pack, 'rb') do |open_pack|
      File.unlink(pack)
      abort unless system(*GIT, 'unpack-objects', in: open_pack)
    end
  end
end

main
